Update app's level

apps.json

@@ -550,7 +550,7 @@
     },
     "decidim": {
         "category": "communication",
-        "level": 7,
+        "level": 0,
         "state": "working",
         "url": "https://github.com/YunoHost-Apps/decidim_ynh"
     },
@@ -782,6 +782,7 @@
     },
     "elabftw": {
         "category": "productivity_and_management",
+        "level": 6,
         "state": "working",
         "url": "https://github.com/YunoHost-Apps/elabftw_ynh"
     },
@@ -1117,6 +1118,7 @@
     },
     "getsimple": {
         "category": "publishing",
+        "level": 1,
         "state": "working",
         "subtags": [
             "websites",
@@ -1465,6 +1467,7 @@
     },
     "indexhibit": {
         "category": "publishing",
+        "level": 6,
         "state": "working",
         "subtags": [
             "websites",
@@ -2388,7 +2391,7 @@
     },
     "onlyoffice": {
         "category": "office",
-        "level": 6,
+        "level": 0,
         "state": "working",
         "subtags": [
             "text",
@@ -2682,6 +2685,7 @@
     },
     "pico": {
         "category": "publishing",
+        "level": 7,
         "state": "working",
         "subtags": [
             "websites",
@@ -2816,7 +2820,7 @@
     },
     "prometheus": {
         "category": "system_tools",
-        "level": 7,
+        "level": 8,
         "state": "working",
         "subtags": [
             "monitoring"
@@ -2981,7 +2985,7 @@
     },
     "retroarch": {
         "category": "games",
-        "level": 0,
+        "level": 8,
         "state": "working",
         "url": "https://github.com/YunoHost-Apps/retroarch_ynh"
     },
@@ -3070,7 +3074,7 @@
     },
     "scratch": {
         "category": "dev",
-        "level": 7,
+        "level": 8,
         "state": "working",
         "subtags": [
             "programming"
@@ -3234,7 +3238,7 @@
     },
     "snappymail": {
         "category": "communication",
-        "level": 6,
+        "level": 7,
         "state": "working",
         "subtags": [
             "email"
@@ -3662,7 +3666,7 @@
     },
     "veloren": {
         "category": "games",
-        "level": 6,
+        "level": 0,
         "maintained": false,
         "state": "working",
         "url": "https://github.com/YunoHost-Apps/veloren_ynh"
@@ -3801,6 +3805,7 @@
     },
     "wondercms": {
         "category": "publishing",
+        "level": 7,
         "state": "working",
         "subtags": [
             "websites",